LifeWay has released the results of a survey of favorite Bible versions among American pastors. The NIV was most likely to be used as the primary source for 31% of American pastors. The NASB was primary among only 10%.
The numbers are closer when the field is narrowed to Southern Baptist pastors, but the overall placement is the same. First is the NIV with 26%, second is the NKJV with 25%, third is the KJV with 23%, and fourth is the NASB with 22%.